University of Sargodha BS 2ª Term Examination 2015 Paper: Probability & Statistics (Math-2110) Subject: Computer Science Time Allowed: 2:30 Hours Maximum Marks: 80

University of Sargodha

BS 2ª Term Examination 2015

Paper: Probability & Statistics (Math-2110)

Subject: Computer Science

Time Allowed: 2:30 Hours

Maximum Marks: 80

Note: Objective part is compulsory. Attempt any three questions from subjective parts.

(Compulsory)

Q#1

Objective Part

Write short answers of the following questions.

i.

ii.

iii.

iv.

V.

vi.

vii.

vill.

ix.

x.

xi.

xii.

Xili.

XiV.

XV.

xvi.

Differentiate between Parameter and Statistic.

Differentiate between Primary and Secondary Data.

What is Stem and Leaf Plot?

Define Probability.

Define Discrete Probability Distribution.

Define Mean of a Random Variable.

Describe the Parameters of Hypergeometric Distribution.

Write down the Mean and Variance of Standard Normal Distribution.

Define Random Sampling.

Define Lower and Upper Limit of Confidence Interval.

Write down the expression of Confidence Interval for Proportion.

Define Statistical Hypothesis.

Differentiate between Null and Alternative Hypothesis.

Define Test Statistic.

Define Regression.

What is meant by Nonlinear Regression Model?

SUBJECTIVE PART

(16 x 2 =

32)

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Maximum Marks: 48

Note: Attempt any three questions. All questions carry equal marks.

Q#2

Given the following grouped frequency table find the mean.

Class

111-115

116-120 121-125 126-130

131-135

136-140

141-145

146-150

151-155 156-160

Freq

Q#3

1

2

4

SIP

9

14

7

6

A group of 220 university students were asked how much time they spent using

Internet each week. The results have been tabulated below. Using this

information, calculate the standard deviation of hours spent on internet by the 220

students.

1

Hours

10-14

15-19

20-24

25-29

30-34

35-39

40-44

No. of students

2

12

23

60

77

visit website:

38

8

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